Sen. Ron Johnson (R-Wisc.) recently sent a letter to Treasury Secretary Steve Mnuchin to review the fraudulent payments made to illegal aliens under IRS Commissioner John Koskinen. The payments were made to those who apply the Additional Child Tax Credit which is made possible because the applicants do not have to submit their Social Security number.

“Under the Obama administration … the Internal Revenue Service (IRS) continued to provide a significant incentive for illegal immigration by failing to prevent the issuance of billions of dollars in fraudulent overpayments of the Additional Child Tax Credit to illegal aliens,” Johnson wrote his letter.

According to a report from the Treasury Inspector General for Tax Administration the IRS paid out $3.4 billion in 2015 to those who are not legally authorized to work in the United States.